使用到的jar包：

Java实现纯文本邮件发送

1 packageorg.westos.email;2

3 importcom.sun.mail.util.MailSSLSocketFactory;4

5 import javax.mail.*;6 importjavax.mail.internet.InternetAddress;7 importjavax.mail.internet.MimeMessage;8 importjava.security.GeneralSecurityException;9 importjava.util.Properties;10

11 public classSendEamil {12 public static void main(String[] args) throwsMessagingException, GeneralSecurityException {13 //创建一个配置文件并保存

14 Properties properties = newProperties();15

16 properties.setProperty("mail.host","smtp.qq.com");17

18 properties.setProperty("mail.transport.protocol","smtp");19

20 properties.setProperty("mail.smtp.auth","true");21

22

23 //QQ存在一个特性设置SSL加密

24 MailSSLSocketFactory sf = newMailSSLSocketFactory();25 sf.setTrustAllHosts(true);26 properties.put("mail.smtp.ssl.enable", "true");27 properties.put("mail.smtp.ssl.socketFactory", sf);28

29 //创建一个session对象

30 Session session = Session.getDefaultInstance(properties, newAuthenticator() {31 @Override32 protectedPasswordAuthentication getPasswordAuthentication() {33 return new PasswordAuthentication("619046217@qq.com","16位授权码");34 }35 });36

37 //开启debug模式

38 session.setDebug(true);39

40 //获取连接对象

41 Transport transport =session.getTransport();42

43 //连接服务器

44 transport.connect("smtp.qq.com","619046217@qq.com","16位授权码");45

46 //创建邮件对象

47 MimeMessage mimeMessage = newMimeMessage(session);48

49 //邮件发送人

50 mimeMessage.setFrom(new InternetAddress("619046217@qq.com"));51

52 //邮件接收人

53 mimeMessage.setRecipient(Message.RecipientType.TO,new InternetAddress("875203654@qq.com"));54

55 //邮件标题

56 mimeMessage.setSubject("Hello Mail");57

58 //邮件内容

59 mimeMessage.setContent("我的想法是把代码放进一个循环里","text/html;charset=UTF-8");60

61 //发送邮件

62 transport.sendMessage(mimeMessage,mimeMessage.getAllRecipients());63

64 //关闭连接

65 transport.close();66 }67 }

Java实现文本图片附件复杂的邮件发送

MIME(多用途互联网邮件扩展类型)

MimeBodyPart类

javax.mail.internet.MimeBodyPart类 表示的是一个MIME消息，它和MimeMessage类一样都是从Part接口继承过来。

MimeMultipart类

javax.mail.internet.MimeMultipart是抽象类 Multipart的实现子类,它用来组合多个MIME消息。一个MimeMultipart对象可以包含多个代表MIME消息的MimeBodyPart对象

1 packageorg.westos.email;2

3 importcom.sun.mail.util.MailSSLSocketFactory;4

5 importjavax.activation.DataHandler;6 importjavax.activation.FileDataSource;7 import javax.mail.*;8 import javax.mail.internet.*;9 importjava.security.GeneralSecurityException;10 importjava.util.Properties;11

12 public classSendComplexEmail {13 public static void main(String[] args) throwsGeneralSecurityException, MessagingException {14 Properties prop = newProperties();15 prop.setProperty("mail.host", "smtp.qq.com"); 设置QQ邮件服务器16 prop.setProperty("mail.transport.protocol", "smtp"); //邮件发送协议

17 prop.setProperty("mail.smtp.auth", "true"); //需要验证用户名密码18

19 //QQ邮箱设置SSL加密

20 MailSSLSocketFactory sf = newMailSSLSocketFactory();21 sf.setTrustAllHosts(true);22 prop.put("mail.smtp.ssl.enable", "true");23 prop.put("mail.smtp.ssl.socketFactory", sf);24

25 //1、创建定义整个应用程序所需的环境信息的 Session 对象

26 Session session = Session.getDefaultInstance(prop, newAuthenticator() {27 @Override28 protectedPasswordAuthentication getPasswordAuthentication() {29 //传入发件人的姓名和授权码

30 return new PasswordAuthentication("619046217@qq.com","16位授权码");31 }32 });33

34 //2、通过session获取transport对象

35 Transport transport =session.getTransport();36

37 //3、通过transport对象邮箱用户名和授权码连接邮箱服务器

38 transport.connect("smtp.qq.com","619046217@qq.com","16位授权码");39

40 //4、创建邮件,传入session对象

41 MimeMessage mimeMessage =complexEmail(session);42

43 //5、发送邮件

44 transport.sendMessage(mimeMessage,mimeMessage.getAllRecipients());45

46 //6、关闭连接

47 transport.close();48

49

50 }51

52 public static MimeMessage complexEmail(Session session) throwsMessagingException {53 //消息的固定信息

54 MimeMessage mimeMessage = newMimeMessage(session);55

56 //发件人

57 mimeMessage.setFrom(new InternetAddress("619046217@qq.com"));58 //收件人

59 mimeMessage.setRecipient(Message.RecipientType.TO,new InternetAddress("619046217@qq.com"));60 //邮件标题

61 mimeMessage.setSubject("带图片和附件的邮件");62

63 //邮件内容64 //准备图片数据

65 MimeBodyPart image = newMimeBodyPart();66 DataHandler handler = new DataHandler(new FileDataSource("E:\\IdeaProjects\\WebEmail\\resources\\测试图片.png"));67 image.setDataHandler(handler);68 image.setContentID("test.png"); //设置图片id69

70 //准备文本

71 MimeBodyPart text = newMimeBodyPart();72 text.setContent("这是一段文本","text/html;charset=utf-8");73

74 //附件

75 MimeBodyPart appendix = newMimeBodyPart();76 appendix.setDataHandler(new DataHandler(new FileDataSource("E:\\IdeaProjects\\WebEmail\\resources\\测试文件.txt")));77 appendix.setFileName("test.txt");78

79 //拼装邮件正文

80 MimeMultipart mimeMultipart = newMimeMultipart();81 mimeMultipart.addBodyPart(image);82 mimeMultipart.addBodyPart(text);83 mimeMultipart.setSubType("related");//文本和图片内嵌成功84

85 //将拼装好的正文内容设置为主体

86 MimeBodyPart contentText = newMimeBodyPart();87 contentText.setContent(mimeMultipart);88

89 //拼接附件

90 MimeMultipart allFile = newMimeMultipart();91 allFile.addBodyPart(appendix);//附件

92 allFile.addBodyPart(contentText);//正文

93 allFile.setSubType("mixed"); //正文和附件都存在邮件中，所有类型设置为mixed94

95

96 //放到Message消息中

97 mimeMessage.setContent(allFile);98 mimeMessage.saveChanges();//保存修改

99

100 returnmimeMessage;101 }102 }

QQ邮箱授权码：

QQ邮箱需获取相应的权限：

QQ邮箱–>邮箱设置–>账户–>POP3/IMAP/SMTP/Exchange/CardDAV/CalDAV服务 开启POP3/SMTP服务，然后获取16位授权码(注意不要将授权码泄露，一个账户可以拥有多个授权码)